Low-Frequency Radio-Emissions from the Earth and Sun.
Abstract
New features of solar type 3 bursts, plasma-wave emissions and high-pass or earth noise (also called terrestrial kilometric radiation) are revealed by a sensitive sweeping receiver operating in the 10 to 100 kHz range on the OGO-1 and OGO-3 satellites. A new feature of the study was the comparison of the dynamic spectra of type 3 bursts with the azimuthal distribution of density in the interplanetary medium. Dynamic spectra observed at times when the associated flare was in a position to illuminate a dense interplanetary region with energetic particles suggest that generation took place in this dense region. Shocks propagating in the interplanetary medium can cause enhancements in the type 3 burst spectra. The relative times of arrival at 1 AU of energetic particles and low-frequency type 3 bursts indicate that the exciting particles are electrons not protons. The effects on the emitted wave of refraction and reduced velocity due to the coronal density are shown to be minimal.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- 1974
- Bibcode:
- 1974PhDT.........1D
- Keywords:
-
- Astronomy;
- Low Frequencies;
- Terrestrial Radiation;
- Type 3 Bursts;
- Density Distribution;
- Ogo;
- Plasma Waves;
- Spectrum Analysis;
- Space Radiation